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Issue #3119 Optimize plot rendering.

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Former-commit-id: d7cb05fd92 [formerly 006df5b77f8f09e0b083b3c3e644744653f3d269]
Former-commit-id: 7274d01d64
This commit is contained in:
Ben Steffensmeier 2014-05-07 12:10:44 -05:00 • committed by Gerrit Code Review
parent 6694af2d5e
commit 9701f68f40
1 changed files with 54 additions and 29 deletions
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83
cave/com.raytheon.viz.core.gl/src/com/raytheon/viz/core/gl/ext/imaging/AbstractGLImagingExtension.java
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@ -19,6 +19,10 @@
**/
package com.raytheon.viz.core.gl.ext.imaging;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.HashSet;
import java.util.Set;
@ -38,9 +42,6 @@ import com.raytheon.uf.viz.core.drawables.ext.IImagingExtension;
import com.raytheon.uf.viz.core.exception.VizException;
import com.raytheon.viz.core.gl.AbstractGLMesh;
import com.raytheon.viz.core.gl.GLCapabilities;
import com.raytheon.viz.core.gl.GLGeometryObject2D;
import com.raytheon.viz.core.gl.GLGeometryObject2D.GLGeometryObjectData;
import com.raytheon.viz.core.gl.GLGeometryPainter;
import com.raytheon.viz.core.gl.IGLTarget;
import com.raytheon.viz.core.gl.glsl.GLSLFactory;
import com.raytheon.viz.core.gl.glsl.GLShaderProgram;
@ -55,12 +56,15 @@ import com.vividsolutions.jts.geom.Coordinate;
*
* SOFTWARE HISTORY
*
* Date Ticket# Engineer Description
* ------------ ---------- ----------- --------------------------
* Dec 15, 2011 mschenke Initial creation
* Jan 9, 2014 2680 mschenke Switched simple PixelCoverage mesh
* rendering to use VBOs instead of
* deprecated immediate mode rendering
* Date Ticket# Engineer Description
* ------------- -------- ----------- --------------------------
* Dec 15, 2011 mschenke Initial creation
* Jan 09, 2014 2680 mschenke Switched simple PixelCoverage mesh
* rendering to use VBOs instead of
* deprecated immediate mode rendering
* May 07, 2014 3119 bsteffen Switched simple PixelCoverage mesh
* rendering to use gl directly instead of
* GLGeometryObject2D
*
* </pre>
*
@ -271,30 +275,51 @@ public abstract class AbstractGLImagingExtension extends
Coordinate ur = pc.getUr();
Coordinate lr = pc.getLr();
Coordinate ll = pc.getLl();
/* Get all the coordinates in direct float buffers */
FloatBuffer vertices = ByteBuffer.allocateDirect(8 * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
vertices.put((float) ll.x).put((float) ll.y);
vertices.put((float) lr.x).put((float) lr.y);
vertices.put((float) ul.x).put((float) ul.y);
vertices.put((float) ur.x).put((float) ur.y);
FloatBuffer texCoords = ByteBuffer.allocateDirect(8 * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
texCoords.put(coords.left()).put(coords.bottom());
texCoords.put(coords.right()).put(coords.bottom());
texCoords.put(coords.left()).put(coords.top());
texCoords.put(coords.right()).put(coords.top());
int geometryType = GL.GL_TRIANGLE_STRIP;
GLGeometryObject2D vertexData = new GLGeometryObject2D(
new GLGeometryObjectData(geometryType, GL.GL_VERTEX_ARRAY));
vertexData.allocate(4);
vertexData.addSegment(new double[][] { { ll.x, ll.y },
{ lr.x, lr.y }, { ul.x, ul.y }, { ur.x, ur.y } });
vertexData.compile(gl);
/* Enable array types */
gl.glEnableClientState(GL.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL.GL_TEXTURE_COORD_ARRAY);
GLGeometryObject2D textureData = new GLGeometryObject2D(
new GLGeometryObjectData(geometryType,
GL.GL_TEXTURE_COORD_ARRAY));
textureData.allocate(4);
textureData.addSegment(new double[][] {
{ coords.left(), coords.bottom() },
{ coords.right(), coords.bottom() },
{ coords.left(), coords.top() },
{ coords.right(), coords.top() } });
textureData.compile(gl);
/* allocate 2 vertex buffers */
IntBuffer vboIds = IntBuffer.allocate(2);
gl.glGenBuffers(2, vboIds);
/* Upload the vertex coordiantes */
gl.glBindBuffer(GL.GL_ARRAY_BUFFER, vboIds.get(0));
gl.glBufferData(GL.GL_ARRAY_BUFFER, 8 * 4, vertices.rewind(),
GL.GL_STREAM_DRAW);
gl.glVertexPointer(2, GL.GL_FLOAT, 0, 0);
/* Upload the texture coordiantes */
gl.glBindBuffer(GL.GL_ARRAY_BUFFER, vboIds.get(1));
gl.glBufferData(GL.GL_ARRAY_BUFFER, 8 * 4, texCoords.rewind(),
GL.GL_STREAM_DRAW);
gl.glTexCoordPointer(2, GL.GL_FLOAT, 0, 0);
GLGeometryPainter.paintGeometries(gl, vertexData, textureData);
/* Unbind */
gl.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);
vertexData.dispose();
textureData.dispose();
/* Do the actual draw */
gl.glDrawArrays(GL.GL_TRIANGLE_STRIP, 0, 4);
/* Delete vertex buffers. */
vboIds.rewind();
gl.glDeleteBuffers(2, vboIds);
/* Disable array types */
gl.glDisableClientState(GL.GL_VERTEX_ARRAY);
gl.glDisableClientState(GL.GL_TEXTURE_COORD_ARRAY);
return PaintStatus.PAINTED;
}